lilypond: version bump to next major stable
netpbm: minor version bump
octomap: version bump
Merge pull request #268 from v4hn/lilypond-2.18

lilypond: version bump to next major stable
Merge pull request #269 from v4hn/netpbm-stable

netpbm: minor version bump
Merge pull request #270 from v4hn/octomap

octomap: version bump